1 //===--- StmtViz.cpp - Graphviz visualization for Stmt ASTs -----*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file implements Stmt::viewAST, which generates a Graphviz DOT file 11 // that depicts the AST and then calls Graphviz/dot+gv on it. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "clang/AST/StmtGraphTraits.h" 16 #include "clang/AST/Decl.h" 17 #include "llvm/Support/GraphWriter.h" 18 19 using namespace clang; 20 21 void Stmt::viewAST() const { 22 #ifndef NDEBUG 23 llvm::ViewGraph(this,"AST"); 24 #else 25 llvm::errs() << "Stmt::viewAST is only available in debug builds on " 26 << "systems with Graphviz or gv!\n"; 27 #endif 28 } 29 30 namespace llvm { 31 template<> 32 struct DOTGraphTraits<const Stmt*> : public DefaultDOTGraphTraits { 33 DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 34 35 static std::string getNodeLabel(const Stmt* Node, const Stmt* Graph) { 36 37 #ifndef NDEBUG 38 std::string OutSStr; 39 llvm::raw_string_ostream Out(OutSStr); 40 41 if (Node) 42 Out << Node->getStmtClassName(); 43 else 44 Out << "<NULL>"; 45 46 std::string OutStr = Out.str(); 47 if (OutStr[0] == '\n') OutStr.erase(OutStr.begin()); 48 49 // Process string output to make it nicer... 50 for (unsigned i = 0; i != OutStr.length(); ++i) 51 if (OutStr[i] == '\n') { // Left justify 52 OutStr[i] = '\\'; 53 OutStr.insert(OutStr.begin()+i+1, 'l'); 54 } 55 56 return OutStr; 57 #else 58 return ""; 59 #endif 60 } 61 }; 62 } // end namespace llvm 63
